In a major scientific infrastructure construction project in Shenzhen, the site levelling involved excavating three mountains at the tail of a reservoir, resulting in the formation of seven high slopes and approximately 400,000 square meters of construction land. To ensure slope safety while considering ecological and landscape effects, six schemes were compared, including landscape terrace retaining walls, slope-type anchor frame beam retaining walls, and slope-type anchor frame beam retaining walls combined with landscape restoration nodes. The primary influencing factors identified were slope stability, landscape effects, economic efficiency, construction duration, and construction difficulty. An Improved Analytic Hierarchy Process (IAHP) based on the Optimal Transfer Matrix was introduced to establish a hierarchical structure model. A reasonable numerical scale was used to construct a comparison judgment matrix, yielding the relative importance weight vector and consistency index. Ultimately, the overall weight ranking of all schemes was obtained, identifying the slope-type anchor frame beam retaining wall combined with landscape restoration nodes as the optimal slope support scheme.